Since the 1990s, scientists have speculated that gamma rays might be produced by the Sun when high-energy cosmic rays from a black hole or supernova collide with its protons. However, scientists hypothesized that it would be extremely rare for these gamma rays to reach Earth.
“After looking at six years’ worth of data, out popped this excess of gamma rays. When we first saw it, we were like; we definitely messed this up. The Sun cannot be this bright at these energies,” said Nisa. Fermi’s measurement of the Sun’s gamma rays estimated the maximum energy to be around 200 billion electron volts.could far exceed this figure. In fact, it could extend maximum into the TeV range – up to roughly 10 TeV.
“From this vantage point, it can observe the aftermath of gamma rays striking air in the atmosphere. Such collisions create what are called air showers, which are a bit like particle explosions that are imperceptible to the naked eye,” explained the release.
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